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Old 11-11-2012, 11:17 PM   #1
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Trane XL80 blows fuse


I have a Trane XL80 furnace. It was intermitantly working for a week or so. The burner would come on then go out after a few seconds and so on. Then it just started working again. Now the furnace has stopped all together. I found that the 5 amp fuse on the board was blown. I replaced it did a couple tests. I turned the power on with the heat turned off on the thermostat. The red light on the board started blinking steady again. I turned the fan on and the fan came on fine. Then I turned the heat on and the fuse blew. I don't see any damaged wires or anything. What could be wrong?

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Old 11-12-2012, 06:43 AM   #2
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Trane XL80 blows fuse


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Originally Posted by BluMagoo View Post
I have a Trane XL80 furnace. It was intermitantly working for a week or so. The burner would come on then go out after a few seconds and so on. Then it just started working again. Now the furnace has stopped all together. I found that the 5 amp fuse on the board was blown. I replaced it did a couple tests. I turned the power on with the heat turned off on the thermostat. The red light on the board started blinking steady again. I turned the fan on and the fan came on fine. Then I turned the heat on and the fuse blew. I don't see any damaged wires or anything. What could be wrong?
unwire stat wires off control board...jumper r to w see if fuse blows....if it don't bad stat...if it does need to continue checking....ben sr

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